Effect of Different Selenium Sources on Production Performance,Immune Function and Antioxidant Capacity of Broilers

This study was conducted to investigate the effect of different selenium sources on production performance,immune function and antioxidant capacity of broilers.A total of 324 one-day-age AA broilers were selected and randomly allocated to three treatments of six replicates with 18 broilers each,0.3 mg/kg of sodium selenite,selenium yeast 1# and selenium yeast 2# were added to the basal diet respectively. The feeding included two phase of 1 to 21 days of age and22 to 42 days of age. The results showed that growth performances were not significantly different between different selenium sources treatments(P0.05). At 21 days of age,serum glutathione peroxides activities of selenium yeast 2#and selenium yeast 1# treatments were significantly higher than sodium selenite treatment(P0.01). At 42 days of age,total superoxide dismutase activity and inhibition of hydroxyl radical of selenium yeast 2# and selenium yeast 1# treatments were significantly higher than that of sodium selenite treatment and malondialdehyde content of which were significantly lower than that of sodium selenite treatment(P0.05).Different sources of selenium on production performance was not significantly affected,but antioxidant capacity of selenium yeast was superior to sodium selenite in broiler.